We're going to the PA RV show and need a bit of advice.

RV shows are a great place to get confused and/or sold more than you can handle at a price that is more than you can find at a reputable dealer. As long as you go and look, great. Otherwise its a waste of time any money.
For a first timer, buy used. For your truck look at TTs under maybe 20 feet. You want bigger? Get a 1 ton. No need to buy a new 70K dollar truck. You can find well equipped 1 ton SRW trucks for under 50K if you do your homework.